About RF Cafe

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its
primary purpose was to provide me with ready access to commonly needed formulas and reference
material while performing my work as an RF system and circuit design engineer. The Internet was
still largely an unknown entity at the time and not much was available in the form of WYSIWYG
...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the
RF Cafe website are hereby acknowledged.

The principle that increases the sensitivity of the
old superregenerative receivers is now being applied to help keep seasoned citizens more firmly on their feet.
Research has shown that as you age, the minor correction signals sent to your brain to counter tipping are often
significantly reduced, causing the characteristic swaying or even falling over. Just as the receivers of yore used
a kind of "tickler voltage," often random noise, to peak its sensitivity to a small signal, specially designed
soles are being developed that increase the sensitivity of the brain to minute corrective foot movements. The
technical term is stochastic resonance. These soles have hundreds of vibrators that, when tuned to the wearer's
natural foot movement frequency, can usually eliminate the problem. They should be in stores by the middle of the
decade.